Emery-wheel for wet grinding



(No Model.)

E, R. & O. KAMPPE.

EMERY WHEEL FOR WET GRINDING.

No. 351,180. Patented 00t.,19, 1886.

wbnivfiwirm. 5%;

UNITE STATES PATENT OFFICE.

FREDERICK KAMPFE, RICHARD KAMPFE, AND oTTo KAMPFE, or BROOK- LYN, NEW YORK.

EMERY-WHEEL FOR WET GRINDING.

SPECIFICATION forming part of Letters Patent No, 351,180, dated Octob r 19, 1886.

Serial No. 194,941. (X model.)

To aZZ whom it may concern.-

Be it known that we, FREDERICK KAMPFE, RICHARD KAMPFE, and OTTo KAMPEE, of Brooklyn, Kings county, New York State,

have invented certain new and useful Improvements in EmeryWVheels for \Vet Grinding, of which the following is a specification.

The great objection to all the emery-wheels used heretofore has been that the emery crys- 1o tals are not held and bound together with sufficient firmness and are apt to be broken from the wheel, this being especially the case with the larger crystals, whereby the grinding edge or face of the wheel is rendered jagged and un- 5 even in a short time and the wheel cannot be used for fine grinding.

The object of our invention is to provide a new and improved en1ery-wheel in which the emery crystals are held firmly and the spaces between them are filled, thus preventing the working edge or face of the wheel from becoming rough or uneven.

The invention consists in an emerywheel composed of a mixture of emery, sulphur, and

pulverized clay, chalk, or other earthy material.

In the accompanying drawing a perspective view of our improved emery-wheel is shown. In making the wheel we melt a quantity of sulphur and add to the molten sulphur the pulverized emery and pulverized clay, chalk, or any other earthy material, the emery and ties. The ingredients are thoroughly mixed and then pressed into suitable molds and per- 3 5 mitted to harden. The sulphur binds the par ticles of emery and earthy material, and the mixture of sulphur and finely-pulverized earthy material fills the interstices between the crystals of emery, and thus smooth Working- 0 surfaces are formed. The sulphur alone is too brittle to hold the emery crystals. The finelypulverized earthy material gives the sulphur 'greater tenacity, and fills the interstices be tween the emery crystals perfectly. The par- 5 tieles of earthy material, sulphur, and emery worn off during the grinding operation are washed off by the water delivered upon the wheel during the operation of grinding.

Having thus described our invention, we claim as new and desire to secure by Letters Patent As an improved article of manulaeture, an emery-wheel for wet grinding, composed of emery, molten sulphur, and pulverized chalk mixed, united, and molded, substantially as set forth.

In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

FREDERICK KAMPFE. RICHARD KAMPFE. OTTO KAMPFE.

Witnesses:

\VILBUR RANKIN,

earthy material being about equal in quanti- ALAN D. KENYoN. 

